A Double-Stream Model for Line Profiles
Abstract
It is shown that gas clouds in a biconical shape may produce profiles similar to those produced in a spherical geometry. The profile shape depends on the radial velocity field, the projection angle, and most importantly, the shell luminosity distribution. If the conical region extends over a large range of radial distance, the resultant profile may be symmetrical with logarithmic wings, otherwise apparent may be observed. It is shown that the double-peaked Hβ profile in Akn 120 can be modeled with a double-stream model.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1990
- DOI:
- 10.1086/169462
- Bibcode:
- 1990ApJ...365..115Z
- Keywords:
-
- Galactic Nuclei;
- H Beta Line;
- Line Shape;
- Line Spectra;
- Seyfert Galaxies;
- Emission Spectra;
- Forbidden Transitions;
- Oxygen Spectra;
- Spectrum Analysis;
- Astrophysics;
- GALAXIES: NUCLEI;
- GALAXIES: SEYFERT;
- LINE PROFILES